thru

thru

thru

Thru is mostly used where the preposition through could be used (e.g. Monday thru Friday); it is less common as an adjective or adverb (I'm thru with the vacuuming). It is less used in formal situations, except in cases where brevity is wanted such as roadway signs or date ranges.

This spelling is not used in standard British English, though it can be used as an abbreviation - similar to thro' that's still sometimes seen - and is recently becoming noticeable via American-based companies.

Through is rarely used in any spelling to indicate ranges in British English; to, till, and until are used instead.

It is often - in both American and British English - used in professional drafting (5/8"³ thru hole) to save space and simplify annotation on a drawing for fabrication or construction.